- Seasonal, cool water facility
- Species produced: Walleye
- Year Established: The Grand Rapids Hatchery was initially located near the spawn take site at Little Cut Foot Sioux Lake. This hatchery was constructed to maintain and expand fishing opportunities for walleye. That hatchery was a wood structure built in the 1920’s. It served well as a hatchery till 1997 when structural updates were needed. Part of the process for construction or rebuild of the old hatchery included archaeologic investigation of the hatchery site. Chippewa remains and artifacts were found during that investigation so the hatchery was moved to its current location in Grand Rapids. The current hatchery is much more sophisticated than the old hatchery.
HISTORY
The current Grand Rapids Hatchery was established in the 1998.Why was it established? To raise walleyes and white suckers. Sucker production was eliminated in 2009. Suckers were use as feed in muskie production. Advances in dry diet technology eliminated the need to hatch and rear suckers for muskie production. Dry diet has many advantages over live food. It can be purchased in bulk, stored for longer periods of time, requires little additional maintenance, and can be used with automatic feeders, thus reducing staff time.The spawning run at Cut Foot Sioux is the largest spawning run in the state and is the primary producer of Mississippi Strain walleye. Workers at the Cutfoot Sioux walleye run typically handle nearly 20,000 adult walleye per year. The run has produced on average over 1,300 quarts of eggs and over 90 million walleye fry annually since 1990.What is the general technology used for the hatchery? The primary source of water is from a well that is 500 feet deep, and city water is used as a secondary source if the well system fails. Large filters are used to remove mineral impurities from the well water, then the water is heated to the desired temperature and pumped to the hatchery batteries.Has the technology been modified since establishment? The hatchery has recently been modified to better facilitate OTC fry marking and egg disinfecting. OTC is a chemical that leaves a mark on the otolithes, or ear bones, of walleye that can be identified when the fish are older. Eggs are now treated with iodine to reduce the risk of spreading VHS or other fish diseases.Fish Management
In general, fish management tools fall into one of four categories:- protecting and restoring habitats and water quality;
- regulating the harvest;
- stocking; and
- public education.
Walleye Management
Minnesota has more walleye, walleye lakes, and walleye anglers than any other state. Each year, anglers harvest about 3.5 million walleye.The best way to maintain walleye numbers is to protect critical habitats. Shore land zoning and related laws aid fish by controlling development and protecting spawning sites and aquatic plants that fish use for cover.Stocking is another management tool used. Minnesota’s cool water hatcheries produce 2 - 5 million walleye fingerlings and millions of fry each year. Stocking can provide walleye fishing in lakes that lack spawning habitats but can otherwise support walleye. Stocking is also effective for lakes that have been “rehabilitated” or occasionally winterkill. Like any tool, stocking must be used appropriately. If misused, it will be ineffective or possibly harmful to existing fish populations. Stocked walleye may compete for food with other game fish, particularly largemouth or smallmouth bass.Stocking a lot of small fish does not guarantee catching a lot of big fish. Fish managers estimate only 4 percent of the annual statewide walleye catch comes from stocked fish. The rest is the result of natural reproduction.Loss of habitat, pollution, and increasing fishing pressure continue to be the biggest issues in walleye management. Everyone must work to improve water quality, control runoff and waterfront development, and maintain aquatic vegetation. Anglers, in addition, will need to comply with regulations and harvest only what they intend to use, for Minnesota to maintain a quality fishery.WALLEYE AND SUCKER PRODUCTION
Walleye begin spawning in April as water temperatures approach 45 degrees. Workers collect and combine, the eggs and milt from walleye spawning at the Cutfoot station. Spawning usually lasts one to three weeks. On a typical day, 50 - 500 quarts of eggs are taken, with 115,000 eggs per quart. The fertilized eggs are transported to the hatchery and hatch in about three weeks.Fry are stocked in area lakes and rearing ponds. Fry stocked in rearing ponds are raised to fingerling stage, then stocked in area lakes in the fall. White sucker fry are used as food in muskie operations.